Aliexpress
Click here… to search for Hawkeye Firefly 8S 170 Degree Action Camera on Aliexpress
Here are coupons that you can use.
Latest coupon and price update (UTC):
Banggood
Banggood warehouse is located in China.
Link: Banggood product page
Coupon (75.41 USD): BGANN30
Coupon (96.96 USD): BGBCBG10
Coupon (99.11 USD): Parts8
(CouponsFromChina.com tip: paste coupon code in your cart and click Apply after clicking “Proceed to checkout”. Click to copy code and open shop)
Old coupons (from the oldest to the newest): 502C6B, f62884, BGHF8S, BGFIRE00, BGPS79, bgssaff9, BGPS30, BGFirefly, BGFirefly 8S, BGBCFPV, bgps30, BGFirefly8S, BG8S8S
(you can check these old coupons out, but these probably won’t work)
Price history and price alert
Price history (for all/most countries) for Hawkeye Firefly 8S 170 Degree Action Camera is here.
Price records source(s): Gearbest, Banggood
Click on image to enlarge. 
You can set price alert (for Banggood).